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Finding the Fourth Proportional to 305,766.20, 422,157.20 and 198,641.54

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Solution

The fourth proportional to 305,766.20, 422,157.20 and 198,641.54 is: 274,255.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    305,766.20 : 422,157.20 = 198,641.54 : x
  2. Step 2: Convert to fraction form
    305,766.20/422,157.20 = 198,641.54/x
  3. Step 3: Cross multiply
    305,766.20x = 422,157.20 × 198,641.54
  4. Step 4: Simplify right side
    305,766.20x = 83,857,956,330.09
  5. Step 5: Solve for x
    x = 83,857,956,330.09/305,766.20
  6. Step 6: Final answer
    x = 274,255.15

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.